44LBS if you're going to play with poly. Trust me, you may think that's low, but it's not and it won't impact your game a lot. What it will do is solve your arm issues if you're sore now after playing with the higher tensions. You've tried everything else, what's the worse that could happen if the lower tensions? Just do you healing exercises and lower that tension to 44LBS.
I just got done using a gut/poly hybrid at 50/45 pounds. At times, it felt too stiff. I can't believe I was just 1 pound above the optimal comfort tension.